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What should I do when Ubuntu freezes?
Mouse can still move but no clicks are registered and everything is locked up

Everything works correctly (music is still playing etc.), just the gui freezes. I am able to ctrl+alt+f1.

What can I do after logging in the ctrl+alt+f1 terminal, in order to restore gnome-shell? If gnome-shell worked, I'd just hit alt+f2 and run r. I usually end up sudo rebooting which I don't like, because I have to reopen apps.

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marked as duplicate by Jorge Castro, hexafraction, Eliah Kagan, Stephen Myall, Mik Sep 28 '12 at 10:14

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

askubuntu.com/a/80544/2973 tried that? –  wojox Sep 24 '12 at 20:10